很可能是brake switch 壞了。這兩個毛病相關，先從簡單的，即switch下手。

所有跟帖： 

• thanks. yeah, i googled and some people claimed the problem is g -ymmud- ♀ (0 bytes) () 04/18/2013 postreply 18:59:22

• 刹車尾燈左邊有一個燈燒了，但是換了個燈泡還是不亮，估計是控製的電路有問題 -ymmud- ♀ (61 bytes) () 04/18/2013 postreply 19:02:57

• most likely it's contact issue, not board -giddyup- ♂ (113 bytes) () 04/18/2013 postreply 19:31:51

• thanks. will do that. -ymmud- ♀ (0 bytes) () 04/18/2013 postreply 20:02:01

• 謝謝，brake switch一般在啥地方 -ymmud- ♀ (0 bytes) () 04/18/2013 postreply 21:12:34